condition	mean	min	max
4 h after light	20.07625	18.0403	22.1122
8 h after light	19.87395	15.4627	24.2852
12 h after light	23.3681	19.9937	26.7425
4 h after dark	43.6282	39.2329	48.0235
8 h after dark	38.1644	37.9091	38.4197
12 h after dark	32.7278	31.0695	34.3861